/etc/init.d/smbd is in samba 2:4.3.8+dfsg-0ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 | #!/bin/sh
### BEGIN INIT INFO
# Provides:          smbd
# Required-Start:    $network $local_fs $remote_fs
# Required-Stop:     $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Should-Start:      slapd cups
# Should-Stop:       slapd cups
# Short-Description: start Samba SMB/CIFS daemon (smbd)
### END INIT INFO
PIDDIR=/var/run/samba
SMBDPID=$PIDDIR/smbd.pid
# clear conflicting settings from the environment
unset TMPDIR
# See if the daemons are there
test -x /usr/sbin/smbd || exit 0
. /lib/lsb/init-functions
case $1 in
	start)
		if init_is_upstart; then
			exit 1
		fi
		SERVER_ROLE=`samba-tool testparm --parameter-name="server role"  2>/dev/null | tail -1`
		if [ "$SERVER_ROLE" = "active directory domain controller" ]; then
		    exit 0
		fi
		log_daemon_msg "Starting SMB/CIFS daemon" smbd
		# Make sure we have our PIDDIR, even if it's on a tmpfs
		install -o root -g root -m 755 -d $PIDDIR
		if ! start-stop-daemon --start --quiet --oknodo --exec /usr/sbin/smbd -- -D; then
			log_end_msg 1
			exit 1
		fi
		log_end_msg 0
		;;
	stop)
		if init_is_upstart; then
			exit 0
		fi
		log_daemon_msg "Stopping SMB/CIFS daemon" smbd
		start-stop-daemon --stop --quiet --pidfile $SMBDPID
		# Wait a little and remove stale PID file
		sleep 1
		if [ -f $SMBDPID ] && ! ps h `cat $SMBDPID` > /dev/null
		then
			# Stale PID file, remove it (should be removed by
			# smbd itself IMHO).
			rm -f $SMBDPID
		fi
		log_end_msg 0
		;;
	reload)
		log_daemon_msg "Reloading /etc/samba/smb.conf" smbd
		start-stop-daemon --stop --quiet --signal HUP --pidfile $SMBDPID
		log_end_msg 0
		;;
	restart|force-reload)
		if init_is_upstart; then
			exit 1
		fi
		$0 stop
		sleep 1
		$0 start
		;;
        status)
		status_of_proc -p $SMBDPID /usr/sbin/smbd smbd
		exit $?
		;;
	*)
		echo "Usage: /etc/init.d/smbd {start|stop|reload|restart|force-reload|status}"
		exit 1
		;;
esac
exit 0
 |